Python-day1 Writing the Login interface

Flow chart:

Code:

1 #Author:p J J2 #Create two new files, one called User_lock.txt, one called User.txt, enter the user name and password in user.txt such as: PJJ 123 If more than one user is required, after entering a user3 #Enter a second user4Count=05  whileCount<3:6Username = input ("Please enter user name:")7F1 = open ('User_lock.txt','r+')8Lock_list =F1.readlines ()9 Ten      forLock_userinchlock_list: OneLock_user = Lock_user.strip ('\ n') A         ifusername==Lock_user: -             Print("User%s has been blacklisted. Program Exit"%username) - exit () theF2 = open ("User.txt","R") -File_list =F2.readlines () -      forLineinchfile_list: -User,pwd=line.strip ("\ n"). Split () +  -         ifusername==User: +Count2=0 A                  whileCount2<3: atPassword=input ("Please enter your password:") -                     ifpassword==pwd: -                         Print("Login Successful") - exit () -                     Else: -                         ifCount2<2: in                             Print("Password input Error! , you can also enter%d times"% (2-count2)) -Count2+=1 to                         Else: +F1.write (username +'\ n') -                             Print("error entering your password 3 times, your account has entered the blacklist") the exit () *  $     Else:Panax Notoginseng         ifCount < 2: -             Print('the%s entered does not exist and can be entered%d times'% (username, 2-count)) theCount + = 1 + Else: A     Print("%s user does not exist, program exits! "%username) the  + f1.close () -F2.close ()

Two new. txt files

User name, password, enumerated in User.txt

Python-day1 Writing the Login interface